You might take her to Medlock's in Collinsville. They have an indoor range and several rental guns. She can try out some and see what she feels best with.
My wife and I did this. She wound up with an XD9-SC. The XD9-SC is a bit heavy, but she carries it anyway because she's confident with it.
Has anyone noticed the newer XD9-SC's come with a 13 round flush fitting mag instead of 10?